<template>
  <div class="top-right-btn">
    <el-row>
      <el-tooltip class="item" effect="dark" :content="showSearch ? '隐藏搜索' : '显示搜索'" placement="top">
        <el-button size="mini" circle icon="el-icon-search" @click="toggleSearch()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="刷新" placement="top">
        <el-button size="mini" circle icon="el-icon-refresh" @click="refresh()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="显隐列" placement="top" v-if="columns">
        <el-button size="mini" circle icon="el-icon-menu" @click="showColumn()" />
      </el-tooltip>
    </el-row>
    <el-dialog :title="title" :visible.sync="open" append-to-body>
      <el-transfer
        :titles="['显示', '隐藏']"
        v-model="value"
        :data="columns"
        @change="dataChange"
      ></el-transfer>
    </el-dialog>
  </div>
</template>
<script>
export default {
  name: "RightToolbar",
  data() {
    return {
      // 显隐数据
      value: [],
      // 弹出层标题
      title: "显示/隐藏",
      // 是否显示弹出层
      open: false,
    };
  },
  props: {
    showSearch: {
      type: Boolean,
      default: true,
    },
    columns: {
      type: Array,
    },
    storageKey: {
      type: String,
    }
  },

  created() {
    if(this.columns){
      if(this.storageKey){

        const  storageValue=   localStorage.getItem(this.storageKey);
        if(storageValue){
          const columnsData=JSON.parse(storageValue);
          for (let column of this.columns){
            for ( let col of columnsData){
              if(column.label=== col['label']){
                 column.visible=col.visible
                 column.sort=col.sort
                break;
              }
            }
          }
        }
      }

      this.$emit("dragTable",[...this.columns].filter(it=>it.visible).sort((a,b)=>a.sort-b.sort));
// 显隐列初始默认隐藏列
      for (let item in this.columns) {
        if (this.columns[item].visible === false) {
          this.value.push(parseInt(item));
        }
      }
    }


  },
  watch: {
    'columns': function(val) {
      if(this.storageKey){
        const value=JSON.stringify(val);
        localStorage.setItem(this.storageKey,value);
      }
    }
  },
  methods: {
    // 搜索
    toggleSearch() {
      this.$emit("update:showSearch", !this.showSearch);
    },
    // 刷新
    refresh() {
      this.$emit("queryTable");
    },
    // 右侧列表元素变化
    dataChange(data) {
      for (const item in this.columns) {
        const key = this.columns[item].key;
        this.columns[item].visible = !data.includes(key);
      }
      if(this.storageKey){
        localStorage.setItem(this.storageKey,JSON.stringify(this.columns));

      }
      this.$emit("dragTable",[...this.columns].filter(it=>it.visible).sort((a,b)=>a.sort-b.sort));

    },
    // 打开显隐列dialog
    showColumn() {
      this.open = true;
    },
  },
};
</script>
<style lang="scss" scoped>
::v-deep .el-transfer__button {
  border-radius: 50%;
  padding: 12px;
  display: block;
  margin-left: 0px;
}
::v-deep .el-transfer__button:first-child {
  margin-bottom: 10px;
}
</style>
